CVE-2026-51882
Critical
Description
The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.
SeverityCritical
CVSS9.1
Exploit probability—
ProductLangchain-Chatchat
PublishedOct 1, 2026
First seenOct 1, 2026
Weakness typeCWE-22Path traversal
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Langchain-Chatchat | 0.3.0 | — |
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